Heinz Ketchup Thunderbird, 14 oz. Plastic Tabletop Bottle, Pack of 16. We believe it's important that you know where the tomatoes in your Ketchup come from. That's why every tomato in every bottle of Heinz® Tomato Ketchup comes from Heinz seeds and is grown by farmers we know and trust. We keep track from seed to table so we know exactly what’s in there. And we promise, it's the very best.